Samsung SGH-E770 - Speaker Troubleshooting

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SGH-E770 Flow Chart of Troubleshooting
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2-11
2-1-5. Speaker Part
Is the terminal of speaker O.K?
NO
Replace the speaker
Are there any signal
at the pin #36, 38 of HDC503?
NO
Check the L CD module
& Replace HDC503
There is no s ound from speaker
YES
YES
Thetypeofsoundfrom
the speaker is Melody?
YES
NO
Are there any signal
at the pin #1,5 of U408?
Are there any signal
at the pin #3,15 of U408?
Check
UCD403,
UCP301,
UCP201
NO
NO
Pin #2 of U408
is Low?
Pin #4 of UCP201
is High?
NO NO
YES
YES
YESYES
END
Pin 8 of U301
is High?
Check U301
YES
NO
Check UCP301